NS486SXL Datasheet, PDF (22/26 Pages) National Semiconductor (TI) – Optimized 32-Bit 486-Class Controller with On-Chip Peripherals for Embedded Systems

OSCX1 AC Specification
DS100121-16
FIGURE 11. TTL Clock Input Timing Diagram
TABLE 22. TTL Clock Input Specification
Symbol
Parameter
Min
t_CTp
CTTL Clock Period
t_CTh
CTTL High Time (Note 16)
t_CTl
CTTL Low Time (Note 16)
t_CTr
CTTL Rise Time
t_CTf
CTTL Fall Time
40
(0.5 x t_CTp) - 4
(0.5 x t_CTp) - 4
Note 16: Except for the cycle in which the core frequency is changed. In this cycle, t_CTh and t_CTl relate to different t_CTp cycles.
PIC AC Specs
Max
870
4
4
Units
ns
ns
ns
ns
ns
Symbol
t_picjljh
t_picahrl
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FIGURE 12. PIC Timing Diagram
TABLE 23. PIC Timing Specifications
Parameter
Min
100
0
22
DS100121-17
Typ
Max